title: SKF-525A on schedule-controlled responding: not antagonized by naloxone.
mesh_terms: D000818:Animals; D010856:Columbidae; D003216:Conditioning, Operant / Q000187:drug effects*; D008297:Male; D009270:Naloxone / Q000494:pharmacology*; D011335:Proadifen / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D012055:Reinforcement Schedule
chemical_list: D009270:Naloxone; D011335:Proadifen